Pulp-press.



-(No Model.)

Patented June '26, I900.

E. G. BURR &. J. E. H. STUT. PULP PRESS.

(Application filed Nov. 27. 1899.)

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m: uonms PETER cu, PNOTO LITNQI WASHINGTON, 0.1:.

No. 652,665. I Patented June 26, I900. E. C. BURR & J. C. H. STUT.

PULP PRESS (Application filed Nov. 27, 1899.) (No Model.) 2 Sheets-Sheet2.

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EDMUND O. BURR, OF SAN FRANCISCO, AND JOHN O. H. STUT, OF OAKLAND,CALIFORNIA, ASSIGNORS OF ONE -TI-IIRD TO JOHN XV. ATKINSON, OF

SANTA MARIA, CALIFORNIA,

PU LP=PRESS= SPECIFICATION formingpart of Letters Iatent No. 652,665,dated June 26, 19 00.

Application filed November 2'7, 1899. serial No. 738,410. (NO model.)

To all whom it may concern: Be it known that we, EDMUND O. BURR, re-

siding in the city and county of San Francisco,

and JOHN G. H. STUT, residing at Oakland,

5 county of Alameda, State of California, citizens of the United States,have invented certain new and useful Improvements in Pulp- Presses; andwe do hereby declare the following to be a full, clear, and exactdescription to of the same.

Our invention relates to pulp-presses used in sugar factories; and itconsists in an improvement in the screens thereof, the object of whichis to save cost by providing for the x5 ready removal of that portion ofthe screen which is subjected to most Wear and the insertion of acorresponding fresh or unworn portion, thus saving for continued usethat large portion of the costly steel screen which does not wear out,but which under present conditions has to be thrown away,

Referring to the accompanying drawings,

Figure 1 is a vertical sectional view of a pulp press, showing ourimproved screen. Fig. 2

2' 5 is an elevation of our improved screen. Fig.

3 is a horizontal section of same.

A is a pulp-press of the usual kind, provided with separately-revolublecones B B, having the spirally-directed lugs, flanges, or

threads I) and b, by which the pulp is gradually squeezed harder andharder in the downwardly-diminishing space lying between the cones andthe exterior screen O. This screen is made of steel and is quite costly.Its lower portion, where the greatest pressure comes,

is braced by exterior rings D; but the wear is so great that from aboutwhere the threads or flanges of the two cones adjoin the screen shortlybecomes useless, and as heretofore the whole screen has been madeintegral it has been necessary to cast it aside at considerable loss. Toremedy this, we make that enough to overlap the adjacent portions and toreceive rivets d from each portion. The removable portion 0 of thescreen and the main portion abut joints, and both being secured to therings are held together as one, and still the lower portion can beremoved when worn and an unworn similar portion substituted, while themain portion remains for a much longer use, of which it is fullycapable, for it is not subjected to much wear.

WVe have found it best to make the lower portion 0 of the screen in twoor more sections, divided as sectors, so that any s pecially-worn partmay be removed. WVhen so divided, the bracing or holding rings D aremade in corresponding sections, the adjacent ends of said sections beingtongued and grooved together, as at (1 and receiving a Wedge-key 61 Theyare thus tightened together and may be readily separated to separate thescreen-sections.

Having thus described our invention, what we claim as new, and desire tosecure by Let ters Patent, is

1. In a pulp-press, the screen exterior or shell thereof, having aseparable, removable portion where subjected to greatest wear, saidportion abutting the remainder of the screen, and a ring overlapping theabutting edges, and secured to each.

2. In a pulp press, the screen exterior or shell thereof, having aseparable, removable portion where subjected to greatest wear, saidportion being divided into sector-sections, rings encircling thesections of said separable removable portion, and composed of separablesections having detachable connections between adjoining ends, one ofsaid rings overlapping the abutting edges of the separable, removableportion, and the remainder of the screen, and secured to each.

3. Ina pulp-press, and in combination with the independently-revolublecones, having the spiral flanges or threads, the soreenexterior orshell, having a separable, removable lower portion, and an encirclingring overlapping the abutting edges of said lower por tion and theremainder of the screen, and secured to each.

4. In apnlp-press, and in combination with removable portion and theremainder of the 16 the independently-revoluble cones, having screen,and secured to each. spiral flanges or threads, the screen exterior Inwitness whereof we have hereunto set or shell having a separable,removable lower our hands.

portion, divided into separable sector-sec- EDMUND O. BURR. tions, andrings encircling said sections and JOHN O. H. STUT; divided intoseparable sections, having de- \Vitnesses: tachable connections, one ofsaid rings over- D. B. RICHARDS, lapping the abutting edges of theseparable,- WALTER F. VANE.

